OXFORD 9000
📚 noun • entry_id 11284

aphelion

/əˈfiː.lɪ.ən/
Meanings (ES + gloss)
afelio
The point in the elliptical orbit of a comet, planet, or other astronomical object, where it is farthest from the Sun.
[I]t follows from the theory of gravity, that the aphelia of Mercury, Venus, the Earth, and Mars, slightly progress.
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